Device for unlocking a door

Abstract

Device for unlocking a door, comprising at least one operating element; a bolt; a coupling which can be placed in the door and which is coupled between the bolt and the operating element, wherein the coupling comprises a pair of scissor arms mounted rotatably around a fixed shaft, and a pair of pivot arms, wherein each pivot arm is connected at a first end for pivoting around a first shaft to a scissor arm and connected at a second end for pivoting around a second shaft to a push part intended to engage against the bolt, such that a tilting of the operating element brings about a movement of the push part, and thus of the bolt.

The invention claimed is: 
     
       1. Device for unlocking a door, comprising:
 an operating element which is intended to be accessible to a user for the purpose of opening the door and which is mounted tiltably relative to the door; 
 a bolt movable between a locking position and an opening position of the door; 
 a coupling which can be placed in the door and which is coupled between the bolt and the operating element for causing a movement of the bolt from the locking position to the opening position upon activation of the operating element, wherein the coupling comprises a pair of scissor arms mounted rotatably around a fixed shaft, and a pair of pivot arms, wherein each pivot arm is connected at a first end for pivoting around a respective first shaft to a respective scissor arm and connected at a second end for pivoting around a second shaft to a push part intended to engage against the bolt, which fixed shaft and first and second shafts are parallel and are intended to extend in a plane substantially parallel to the door, this such that a tilting of the operating element brings about a movement of the push part, which movement of the push part brings about a movement of the bolt. 
 
     
     
       2. Device as claimed in  claim 1 , wherein the device further comprises a housing, which housing is intended for insertion into a recess in the door, wherein the fixed shaft is fixedly mounted in the housing and the second shaft is mounted for movement in a guide in the housing. 
     
     
       3. Device as claimed in  claim 1 , wherein the operating element takes the form of a flap suspended pivotally on one side from the housing, which flap extends in a plane substantially parallel to the fixed shaft and the first and second shafts. 
     
     
       4. Device as claimed in  claim 1 , comprising a first operating element and a second operating element, which first and second operating elements extend on either side of the coupling and are intended to be built into opposite sides of the door. 
     
     
       5. Device as claimed in  claim 4 , wherein the first operating element is tiltable around a first tilting shaft and wherein the second operating element is tiltable around a second tilting shaft parallel to the first tilting shaft, the first and second tilting shafts being spring-mounted relative to each other, this such that these tilting shafts are movable toward each other during placing of the device in the door and can move with spring action away from each other for the purpose of positioning the device in the door. 
     
     
       6. Device as claimed in  claim 4 , further comprising a housing, which housing is intended for insertion into a recess in the door, wherein the fixed shaft is fixedly mounted in the housing and the second shaft is mounted for movement in a guide in the housing, and wherein the first and the second operating elements are each connected by means of a spring-mounted arm to the housing. 
     
     
       7. Device as claimed in  claim 6 , wherein each spring-mounted arm is connected to a second fixed shaft which is parallel to the fixed shaft around which the pair of scissor arms rotate. 
     
     
       8. Device as claimed in  claim 1 , wherein the scissor arms are spring-mounted relative to each other such that the spring action moves the scissor arms away from each other. 
     
     
       9. Device as claimed in  claim 1 , wherein a spring means is provided for the purpose of holding the bolt in the locking position. 
     
     
       10. Device as claimed in  claim 1 , wherein the operating element is provided with a pin which is arranged such that activation of the operating element carries the coupling from a rest position to an activated position, wherein the scissor arms move toward each other and the pivot arms move toward each other such that the push part moves in the direction of the bolt. 
     
     
       11. Device as claimed in  claim 1 , wherein each scissor arm is connected at a first end to the first end of the respective pivot arm and is connected at a second end to a press plate, wherein in the activated position the operating mechanism engages against this press plate in order to move the scissor arms toward each other. 
     
     
       12. Device as claimed in  claim 1 , wherein the device comprises a means to hold the bolt in the locking position. 
     
     
       13. Device for unlocking a door, comprising:
 first and second operating elements which are intended to be accessible to a user for the purpose of opening the door and which are mounted tiltably relative to the door; 
 a bolt movable between a locking position and an opening position of the door; 
 a coupling which can be placed in the door and which is coupled between the bolt and the first and second operating elements for causing a movement of the bolt from the locking position to the opening position upon activation of either of the first and the second operating element, wherein the coupling comprises a pair of scissor arms mounted rotatably around a fixed shaft, and a pair of pivot arms, wherein each pivot arm is connected at a first end for pivoting around a respective first shaft to a respective scissor arm and connected at a second end for pivoting around a second shaft to a push part intended to engage against the bolt, which fixed shaft and first and second shafts are parallel and are intended to extend in a plane substantially parallel to the door, this such that a tilting of either of the first or the second operating element brings about a movement of the push part, which movement of the push part brings about a movement of the bolt; 
 wherein the device further comprises a housing, which housing is intended for insertion into a recess in the door, wherein the fixed shaft is fixedly mounted in the housing and the second shaft is mounted for movement in a guide in the housing; and 
 wherein the first and the second operating elements extend on either side of the coupling and are intended to be built into opposite sides of the door. 
 
     
     
       14. Device as claimed in  claim 13 , wherein each of the first and the second operating elements takes the form of a flap suspended pivotally on one side from the housing, which flap extends in a plane substantially parallel to the fixed shaft and the first and second shafts. 
     
     
       15. Device as claimed in  claim 14 , wherein the first operating element is tiltable around a first tilting shaft and wherein the second operating element is tiltable around a second tilting shaft parallel to the first tilting shaft, the first and second tilting shafts being spring-mounted relative to each other, this such that these tilting shafts are movable toward each other during placing of the device in the door and can move with spring action away from each other for the purpose of positioning the device in the door. 
     
     
       16. Device as claimed in  claim 14 , wherein the first and the second operating element are each connected by means of a spring-mounted arm to the housing. 
     
     
       17. Device as claimed in  claim 16 , wherein each spring-mounted arm is connected to a second fixed shaft which is parallel to the fixed shaft around which the pair of scissor arms rotates. 
     
     
       18. Device as claimed in  claim 13 , wherein the scissor arms are spring-mounted relative to each other such that the spring action moves the scissor arms away from each other. 
     
     
       19. Door comprising a device for unlocking a door, comprising:
 an operating element which is intended to be accessible to a user for the purpose of opening the door and which is mounted tiltably relative to the door; 
 a bolt movable between a locking position and an opening position of the door; 
 a coupling which can be placed in the door and which is coupled between the bolt and the operating element for causing a movement of the bolt from the locking position to the opening position upon activation of the operating element, wherein the coupling comprises a pair of scissor arms mounted rotatably around a fixed shaft, and a pair of pivot arms, wherein each pivot arm is connected at a first end for pivoting around a respective first shaft to a respective scissor arm and connected at a second end for pivoting around a second shaft to a push part intended to engage against the bolt, which fixed shaft and first and second shafts are parallel and are intended to extend in a plane substantially parallel to the door, this such that a tilting of the operating element brings about a movement of the push part, which movement of the push part brings about a movement of the bolt. 
 
     
     
       20. Door as claimed in  claim 19 , wherein the bolt is mounted for tilting between a locking position and an opening position in the door around a transverse shaft oriented perpendicularly of the door.